summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/exynos/exynos_drm_encoder.c
blob: 86b93dde219a51a3a4e224fa800841ab76dcc92b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
/* exynos_drm_encoder.c
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Authors:
 *	Inki Dae <inki.dae@samsung.com>
 *	Joonyoung Shim <jy0922.shim@samsung.com>
 *	Seung-Woo Kim <sw0312.kim@samsung.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include "drmP.h"
#include "drm_crtc_helper.h"

#include "exynos_drm_drv.h"
#include "exynos_drm_crtc.h"
#include "exynos_drm_encoder.h"

#define to_exynos_encoder(x)	container_of(x, struct exynos_drm_encoder,\
				drm_encoder)

/*
 * exynos specific encoder structure.
 *
 * @drm_encoder: encoder object.
 * @manager: specific encoder has its own manager to control a hardware
 *	appropriately and we can access a hardware drawing on this manager.
 * @dpms: store the encoder dpms value.
 */
struct exynos_drm_encoder {
	struct drm_encoder		drm_encoder;
	struct exynos_drm_manager	*manager;
	int dpms;
};

static void exynos_drm_display_power(struct drm_encoder *encoder, int mode)
{
	struct drm_device *dev = encoder->dev;
	struct drm_connector *connector;
	struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		if (connector->encoder == encoder) {
			struct exynos_drm_display_ops *display_ops =
							manager->display_ops;

			DRM_DEBUG_KMS("connector[%d] dpms[%d]\n",
					connector->base.id, mode);
			if (display_ops && display_ops->power_on)
				display_ops->power_on(manager->dev, mode);
		}
	}
}

static void exynos_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
{
	struct drm_device *dev = encoder->dev;
	struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
	struct exynos_drm_manager_ops *manager_ops = manager->ops;
	struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);

	DRM_DEBUG_KMS("%s, encoder dpms: %d\n", __FILE__, mode);

	if (exynos_encoder->dpms == mode) {
		DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
		return;
	}

	mutex_lock(&dev->struct_mutex);

	switch (mode) {
	case DRM_MODE_DPMS_ON:
		if (manager_ops && manager_ops->apply)
			manager_ops->apply(manager->dev);
		exynos_drm_display_power(encoder, mode);
		exynos_encoder->dpms = mode;
		break;
	case DRM_MODE_DPMS_STANDBY:
	case DRM_MODE_DPMS_SUSPEND:
	case DRM_MODE_DPMS_OFF:
		exynos_drm_display_power(encoder, mode);
		exynos_encoder->dpms = mode;
		break;
	default:
		DRM_ERROR("unspecified mode %d\n", mode);
		break;
	}

	mutex_unlock(&dev->struct_mutex);
}

static bool
exynos_drm_encoder_mode_fixup(struct drm_encoder *encoder,
			       struct drm_display_mode *mode,
			       struct drm_display_mode *adjusted_mode)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	/* drm framework doesn't check NULL. */

	return true;
}

static void exynos_drm_encoder_mode_set(struct drm_encoder *encoder,
					 struct drm_display_mode *mode,
					 struct drm_display_mode *adjusted_mode)
{
	struct drm_device *dev = encoder->dev;
	struct drm_connector *connector;
	struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
	struct exynos_drm_manager_ops *manager_ops = manager->ops;
	struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
	struct exynos_drm_overlay *overlay = get_exynos_drm_overlay(dev,
						encoder->crtc);

	DRM_DEBUG_KMS("%s\n", __FILE__);

	mode = adjusted_mode;

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		if (connector->encoder == encoder) {
			if (manager_ops && manager_ops->mode_set)
				manager_ops->mode_set(manager->dev, mode);

			if (overlay_ops && overlay_ops->mode_set)
				overlay_ops->mode_set(manager->dev, overlay);
		}
	}
}

static void exynos_drm_encoder_prepare(struct drm_encoder *encoder)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	/* drm framework doesn't check NULL. */
}

static void exynos_drm_encoder_commit(struct drm_encoder *encoder)
{
	struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
	struct exynos_drm_manager_ops *manager_ops = manager->ops;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	if (manager_ops && manager_ops->commit)
		manager_ops->commit(manager->dev);
}

static struct drm_crtc *
exynos_drm_encoder_get_crtc(struct drm_encoder *encoder)
{
	return encoder->crtc;
}

static struct drm_encoder_helper_funcs exynos_encoder_helper_funcs = {
	.dpms		= exynos_drm_encoder_dpms,
	.mode_fixup	= exynos_drm_encoder_mode_fixup,
	.mode_set	= exynos_drm_encoder_mode_set,
	.prepare	= exynos_drm_encoder_prepare,
	.commit		= exynos_drm_encoder_commit,
	.get_crtc	= exynos_drm_encoder_get_crtc,
};

static void exynos_drm_encoder_destroy(struct drm_encoder *encoder)
{
	struct exynos_drm_encoder *exynos_encoder =
		to_exynos_encoder(encoder);

	DRM_DEBUG_KMS("%s\n", __FILE__);

	exynos_encoder->manager->pipe = -1;

	drm_encoder_cleanup(encoder);
	kfree(exynos_encoder);
}

static struct drm_encoder_funcs exynos_encoder_funcs = {
	.destroy = exynos_drm_encoder_destroy,
};

struct drm_encoder *
exynos_drm_encoder_create(struct drm_device *dev,
			   struct exynos_drm_manager *manager,
			   unsigned int possible_crtcs)
{
	struct drm_encoder *encoder;
	struct exynos_drm_encoder *exynos_encoder;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	if (!manager || !possible_crtcs)
		return NULL;

	if (!manager->dev)
		return NULL;

	exynos_encoder = kzalloc(sizeof(*exynos_encoder), GFP_KERNEL);
	if (!exynos_encoder) {
		DRM_ERROR("failed to allocate encoder\n");
		return NULL;
	}

	exynos_encoder->dpms = DRM_MODE_DPMS_OFF;
	exynos_encoder->manager = manager;
	encoder = &exynos_encoder->drm_encoder;
	encoder->possible_crtcs = possible_crtcs;

	DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);

	drm_encoder_init(dev, encoder, &exynos_encoder_funcs,
			DRM_MODE_ENCODER_TMDS);

	drm_encoder_helper_add(encoder, &exynos_encoder_helper_funcs);

	DRM_DEBUG_KMS("encoder has been created\n");

	return encoder;
}

struct exynos_drm_manager *exynos_drm_get_manager(struct drm_encoder *encoder)
{
	return to_exynos_encoder(encoder)->manager;
}

void exynos_drm_fn_encoder(struct drm_crtc *crtc, void *data,
			    void (*fn)(struct drm_encoder *, void *))
{
	struct drm_device *dev = crtc->dev;
	struct drm_encoder *encoder;
	struct exynos_drm_private *private = dev->dev_private;
	struct exynos_drm_manager *manager;

	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
		/*
		 * if crtc is detached from encoder, check pipe,
		 * otherwise check crtc attached to encoder
		 */
		if (!encoder->crtc) {
			manager = to_exynos_encoder(encoder)->manager;
			if (manager->pipe < 0 ||
					private->crtc[manager->pipe] != crtc)
				continue;
		} else {
			if (encoder->crtc != crtc)
				continue;
		}

		fn(encoder, data);
	}
}

void exynos_drm_enable_vblank(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	struct exynos_drm_manager_ops *manager_ops = manager->ops;
	int crtc = *(int *)data;

	if (manager->pipe == -1)
		manager->pipe = crtc;

	if (manager_ops->enable_vblank)
		manager_ops->enable_vblank(manager->dev);
}

void exynos_drm_disable_vblank(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	struct exynos_drm_manager_ops *manager_ops = manager->ops;
	int crtc = *(int *)data;

	if (manager->pipe == -1)
		manager->pipe = crtc;

	if (manager_ops->disable_vblank)
		manager_ops->disable_vblank(manager->dev);
}

void exynos_drm_encoder_crtc_plane_commit(struct drm_encoder *encoder,
					  void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
	int zpos = DEFAULT_ZPOS;

	if (data)
		zpos = *(int *)data;

	if (overlay_ops && overlay_ops->commit)
		overlay_ops->commit(manager->dev, zpos);
}

void exynos_drm_encoder_crtc_commit(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	int crtc = *(int *)data;
	int zpos = DEFAULT_ZPOS;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	/*
	 * when crtc is detached from encoder, this pipe is used
	 * to select manager operation
	 */
	manager->pipe = crtc;

	exynos_drm_encoder_crtc_plane_commit(encoder, &zpos);
}

void exynos_drm_encoder_dpms_from_crtc(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
	int mode = *(int *)data;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	exynos_drm_encoder_dpms(encoder, mode);

	exynos_encoder->dpms = mode;
}

void exynos_drm_encoder_crtc_dpms(struct drm_encoder *encoder, void *data)
{
	struct drm_device *dev = encoder->dev;
	struct exynos_drm_encoder *exynos_encoder = to_exynos_encoder(encoder);
	struct exynos_drm_manager *manager = exynos_encoder->manager;
	struct exynos_drm_manager_ops *manager_ops = manager->ops;
	struct drm_connector *connector;
	int mode = *(int *)data;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	if (manager_ops && manager_ops->dpms)
		manager_ops->dpms(manager->dev, mode);

	/*
	 * set current dpms mode to the connector connected to
	 * current encoder. connector->dpms would be checked
	 * at drm_helper_connector_dpms()
	 */
	list_for_each_entry(connector, &dev->mode_config.connector_list, head)
		if (connector->encoder == encoder)
			connector->dpms = mode;

	/*
	 * if this condition is ok then it means that the crtc is already
	 * detached from encoder and last function for detaching is properly
	 * done, so clear pipe from manager to prevent repeated call.
	 */
	if (mode > DRM_MODE_DPMS_ON) {
		if (!encoder->crtc)
			manager->pipe = -1;
	}
}

void exynos_drm_encoder_crtc_mode_set(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
	struct exynos_drm_overlay *overlay = data;

	if (overlay_ops && overlay_ops->mode_set)
		overlay_ops->mode_set(manager->dev, overlay);
}

void exynos_drm_encoder_crtc_disable(struct drm_encoder *encoder, void *data)
{
	struct exynos_drm_manager *manager =
		to_exynos_encoder(encoder)->manager;
	struct exynos_drm_overlay_ops *overlay_ops = manager->overlay_ops;
	int zpos = DEFAULT_ZPOS;

	DRM_DEBUG_KMS("\n");

	if (data)
		zpos = *(int *)data;

	if (overlay_ops && overlay_ops->disable)
		overlay_ops->disable(manager->dev, zpos);
}

MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
MODULE_DESCRIPTION("Samsung SoC DRM Encoder Driver");
MODULE_LICENSE("GPL");